Acceleration of Metal Ion Incorporation into Cationic Porphyrin by 5-Sulfo-8-quinolinol, and Spectrophotometric Determination of Nickel(II)

Kawamura, Kunio; Igarashi, Shukuro; Yotsuyanagi, Takao

doi:10.1007/s00604-005-0458-9

Cited by 6 publications

(1 citation statement)

References 13 publications

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“…Generally, the incorporation reaction of metal ions into the porphyrin ring is difficult due to the difficulty in deforming porphyrin ring [20], [29]–[30]. However, on the basis of forming TAPP/GO nanohybrids, the iron (III) ions being chelated by the TAPP moieties is very fast (Figure S5 in supporting information).…”

Section: Resultsmentioning

confidence: 99%

Obstruction of Photoinduced Electron Transfer from Excited Porphyrin to Graphene Oxide: A Fluorescence Turn-On Sensing Platform for Iron (III) Ions

2012

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A comparative reaserch of the assembly of different porphyrin molecules on graphene oxide (GO) and reduced graphene oxide (RGO) was carried out, respectively. Despite the cationic porphyrin molecules can be assembled onto the surfaces of graphene sheets, including GO and RGO, to form complexes through electrostatic and π-π stacking interactions, the more obvious fluorescence quenching and the larger red-shift of the Soret band of porphyrin molecule in RGO-bound states were observed than those in GO-bound states, due to the differenc of molecular flattening in degree. Further, more interesting finding was that the complexes formed between cationic porphyrin and GO, rather than RGO sheets, can facilitate the incorporation of iron (III) ions into the porphyrin moieties, due to the presence of the oxygen-contained groups at the basal plane of GO sheets served as auxiliary coordination units, which can high-efficiently obstruct the electron transfer from excited porphyrin to GO sheets and result in the occurrence of fluorescence restoration. Thus, a fluorescence sensing platform has been developed for iron (III) ions detection in this contribution by using the porphyrin/GO nanohybrids as an optical probe, and our present one exhibited rapid and sensitive responses and high selectivity toward iron (III) ions.

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Section: Resultsmentioning

confidence: 99%